Adding device.



H. L. KIRKPATRICK.

ADDING DEVICE.

APPLICATION FILED SEPT. I8, 1914.

1,180,980. I Patented Apr. 25,1916.

' 2/ s 2 X I I (j ,I9 I

WITNESSES ATTORNEYS UNITED STATES PATENT OFFICE.

HENRY L. KIRKPATRICK, OF PHILADELPHIA, PENNSYLVANIA.

ADDING DEVICE.

Application filed September 18, 1914.

17 'o all whom 'it ymczg/ concern lie it known that I, HENRY L. Kinxrxr- RICK, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Adding Device, of which the following is a specification.

My invention consists of a device for add? ing figures, which is portable and adapted `to be carried in a pocket and capable of counting and adding sums of small numbers.

It further consists of such a device in which an index is provided for indicating the number of the maximum sums counted on the dials of the device.

1t further consists of other novel features of construction, all as will be hereinafter fully set forth.

The annexed drawing and the following description set forth in detail one mechanical form embodying the invention, such detail construction being but one of various mechanical forms in which the principle of the invention may be had.

In said annexed drawings- Figure 1 represents an elevation of the device. Fig. 2 represents an axial section of the same. Fig. 3 represents a plan view of the unit counting dial. Fig. 4 represents a plan View of the decimal counting dial-disk. Fig. 5 represents a plan view of the back of such dialdisk. Fig. 6 represents a plan view of the inner side of the hack-casing.

Similar numerals of reference indicate corresponding parts in the figures.

Referring' to the drawings, the reference numeral lxindicates a circular disk having the numerals from l to 9" marked equidistantly in a circle and having an opening, 2, at the point where the cipher would he in a division of the disk in ten equal divisions. A circular back-casing, B, has an annular side-flange, l, `and has its bottom raised to form an annular groove. 5. at said fiange. A tongue, 6, projects from the edge of the front dial-disk and is doubled upon itself and has its end bent at a right angle to fit into a loop, T, upon the side-flange of the back-casing, whereby the front disk and hack-easing are connected. A sleeve, 8, extends from the center of the bottom of the Specification of Letters Patent.

Patented Apr. 25, 1916.

serial No. 862,262.

hack-casing and has its end upset over the edge of a central opening in the front dialdisk, at 9, to secure said disk upon said sleeve. An annular unit-counting dial, 10, has an annular flange upon its inner edge, which flange fits to rotate in the annular side-flange of the hack-casing, and said annular dial has on its periphery teeth or proliections` 11,'in the present instance ten in number. The annular dial has the cipher and digits marked upon its outer face at equal distances from each other, so that such figures may be successively presented through the opening in the face plate l, and said figures register with the teeth, so that each figure applies to one tooth. A decimal dial, 12, is journaled with vits center upon the central sleeve and has the cipher and nine digits marked in an annular series upon its outer face at equal distances and to register with the opening in the front disk.

The raised center,` 13, of a ratchet disk, ll, is journaled at its center upon the sleeve and secured to or forming a part of the decimal dial 12, and said ratchet disk has ratchet teeth, 15, on its periphery. each tooth registering` with one of the figures of the decimal dial. A fiat and inwardly bent spring, 1G, is secured upon the inner periphery of the annular dial with its free end registering with one figure upon the face of the same, preferably with the cipher mark, and the free end of said spring engages the ratchetteeth of the decimal dial structure. The raised center of the back-casing has a straight portion, 1T, in its edge, and the spring-pawl of the annular unit dial bears against the periphery of such center to be held out of engagement with the ratchetteeth of the decimal dial, but will spring inward to engage a tooth of said dial when it arrives at the straight cut-away portion, to

engage and move the decimal dial for the space of one tooth at each revolution of the annular d1al. A screw, 18. 1s journaled 1n has been counted upon the dials and two ciphers are exposed at the opening in the front disk.

In practice, the annular dial is rotated by engaging the teeth ot' the same until the two ciphers ot the disks show through the opening in the tront dial'disk. \\'hen beginning to count, the projection upon the annular dial opposite the number on thc tace dial which is to be counted is turned until it engages beneath the ear of the tace disltn This will expose the figure counted through the opening ot. the tace disk. The projection corresponding to the next number to be counted is then turned to the ear upon the face disk, and so forth until the numbers are all added. Each. time the annular dial makes one revolutionl and counts ten. the decimal dial is moved one tooth and the space of one numeral, the two numerals exposed through the opening in the tace-dial indicating the total counted. When the numerals showing through the opening in the tace disk are the two ciphers, the amount counted is one hundred, and the device begins on the next hundred. and to register the hundred the hand is pointed to the number on the face plate indicating the number ot' the hundred just counted. The device will thus add up to and register one thousand.

The device is very simple ot' construction and consists of eonuvmrativcly few parts` so that the device is durable and inexpensive to construct, and is not liable to get out ol order.

Other modes vof applying the principle of my invention may be employed for the mode herein explained. Change may therefore be made as regards the mechanism thus disclosed, provided the principles ot" construction set forth, respectively, in the following claims are employed.

Having thus described my invention, what l claim as new vand desire to secure by Letters Patent, ist-- l. In a device of the character stated, a face dial having an annular series ot' numerals and an opening, an annular dial revolubly supported beneath said tace dial to have a series of numerals upon its 'face successively register with said opening and having peripheral projections registering with the numerals upon it and upon the facedial, a dial revolubly supported beneath the face dial and within the annular dial and provided with a raised central ratchet portion and having an annular series of numerals adapted to successively register with the opening in the tace-dial, coperating peripheral means t'or holding said i'ace dial and the back ot' the device together, and means for rotating said last dial for the space oit' one numeral tor one whole revolution ot said annular dial.

2. In a device et' the character stated, a.

face dial having an annular series of numerals and an opening` an annular dial revoluhly supported beneath said 'taccfdial to have a series oic numerals upon its vtace successively register with said opening and having peripheral projections registering with the numerals upon it and upon the tacedial, a dial rcvolubly supported beneath the face-dial, and within the annular dial and having an annular series ol' numerals adapted to successively register with the opening in the tace-dial and peripheral ratchet teeth registering with said inuncrals. and a tlat and inwardly bent spring upon the annular dial and its tree end adapted to engage directly one of such ratchet-teeth once at cach revolution.

3%. ln a device ot the charrwtcr stated, a tace dial having an annular series ol' numerals and an opening, a hack casing having an annular side-w all and an annular groove in its bottom, said baci: casing ha ving a raisei'l center having a straight portion in a portion of its inner tace and a central sleeve having its end secured in the center ot' the tace-dial. an annular dial ha\ ing a Ilange on itsl inner periphcrj.' and within the side-\vall of the latch-casing and having au annular series of' numerals successively rcj,i.--rriu5 with the pening in thc tace-dial and peripheral proliections registering with such nlnncrals, a dial having an annular series ot numerals registering with the opening in the ilface dial and rotatably supported upon thc central sleeve and provided with ratchet teeth regis tering with thc numerals upon it. interengagingpci'iplna'al means on the tace dial l' casing for connecting the same,

and the bara and a spring pawl upon the inner peripher \Y ot the llange of the annular dial rotating in the groove of the haelt and cngagiiur a tooth ot the limer dial when passing tlustraight portion ot the side of the annular groove.

i. In a device ot the character stated, a casing having an annular side flange and raised bottom forming an annular groove at said 'llangtn a face dial having an annular series ot numerals and an opening. dials ro` tatahle within said casing and having numerals successively presenting at the opening in said 'tace dial and having peripheral projections registering with thc numerals ot thc Vt'ace dial. one oit said dials having peripheral ratchet teeth registering with said numerals, and a spring pawl located in said groove and mounted to engage one otsuch ratchet teeth once at each revolution. one of said dials having a flange projecting into said groove, said bacl casing having a sleeve passing through said dials and serving to secure the `lare dial in position.

5. In a device of the character stated, a. back casing having an annular side tlange and raised bottom forming an annular groove at said flange, a face dial, dials rotatable within s'ld casing, one of Said dials hand on the other end movable over the [mung :l llnngv projecting lnto Saul groove, front dull.

nid back 02min" having.r n Sleeve. passed HFI, Y r r r d' I. KTRRP R K. through sand dull und swung tn swzm the j J AT IC {m'v (hul 1n posltlon. :1nd n. screw mounted \V1t11ess@s: in :mld sluefe hnvmfT a knob :1t one und bear- C. D. MCVAY. P1

ing :zgnimt the buck Casing und :1n index K. A\I. BnnPnY. 

